Windows 7: PS3 and Laptop Problem

Hello everyone,
I've been trying since yesterday to fix this problem, but I finally decided to give up and turn to you guys.

I have a USB Dongle connected to my Windows 7 laptop, and the laptop is sharing Internet connection with my PS3 via an Ethernet cable.

I was on PlayStation Network yesterday but I suddenly couldn't connect anymore and I kept getting "The attempt to obtain an IP address failed." So I tried to fix it myself by connecting/reconnecting the USB and the cable, and by turning on/off the PS3 and the laptop but in vain.

So how can I reconnect to PSN via Ethernet (which is connected to my laptop)?



Please note that my PS3 can still connect to PSN, sometimes, via some unknown wireless networks the console detects, but I can't connect via my own Ethernet connection due to the IP issue mentioned above.

Also, when I run Windows Diagnosis for the Local Network Connection (which is how my PS3 appears on my laptop) and which is an Unknown Network, I get the following message "Does not have a valid IP configuration." (the diagnosis says that it's not solved and it doesn't give any suggestions on how to solve it)


Thank you very much in advance